Original scientific paper

Palladium Ternary Complex with Chromeazurol S and Cetyltrimethylainmonium Bromide and Cetylpyridinium Bromide

Ravi Kant ; Department of Chemistry, University of Allahabad, Allahabad, India
Rajesh Srivastava ; Department of Chemistry, University of Allahabad, Allahabad, India
Om Prakash ; Department of Chemistry, University of Allahabad, Allahabad, India

Abstract

Formation of green coloured ternary complexes between palladium,
chromeazurol S and cetyltrimethylammonium bromide
or cetylpyridinium bromide is described over the pH range 4.6 to
5.6. The compositions, Pd(CAS)CTA2 and Pd(CAS)CP2 for the
ternary complexes have been established by Job's method of
continuous variations and by the mole ratio method using absorbance
data. Strict control of experimental conditions is essential
for employing these methods for the determination of composition.
The ternary systems obey Beer's law between 0.053 to 2.98 ppm
of palladium. A high molar absorptivity (Pd-CAS-CTAB, 5.25 x 104 ;
Pd-CAS-CPB, 6.16 X 104 mo1-1 cm-1) and Sandell's sensitivity
(0.002 ~tg cm-2) have been obtained at 620 nm. A spectrophotometric
method has been proposed using these ternary complexes for
microdetermination of palladium. The method is sensitive, precise
and selective. The effect of various cations and anions is studied.
The mode of formation and structures of the ternary complexes
are discussed.

Keywords

Hrčak ID:

194311

URI

https://hrcak.srce.hr/194311

Publication date:

25.2.1982.

Visits: 788 *